Fill in the blanks with the correct form of the verb:

An Aeroplane ______ more quickly than a bird.

Correct option is A

The correct form of the verb is "flies".

So, the complete sentence is: "An aeroplane flies more quickly than a bird."

Subject: "An aeroplane"

verb: "flies" (present tense of "to fly")

The verb "flies" correctly matches the singular subject "an aeroplane" and indicates the action performed by it.